プログレッシブ和英中辞典(第4版)の解説
こうろん【口論】
〔口げんか〕 ((have)) a quarrel;〔議論〕an argument
口論する quarrel ((with));argue ((with))
彼は父と将来のことで口論した
He had 「a quarrel [an angry dispute] with his father about his future.
二人が会うと決まって口論が始まる
Whenever the two meet, 「there is an exchange of fiery words [they get into a bitter argument].